Improvement in grain-cleaners



. proved grain-cleaner.

UNITED STATES EDWIN W. JOHNSON, OF FORESTON, ILLINOIS.

IMPROVEMENT IN GRAIN-CLEAN ERS.

Speciiiaation forming part of Letters Patent N o. 174,253, datedFebruary 29, 1876; application tiled October 23, 1875. v

Y To all whom it may concern:

e Be it known that I, EDWIN W. JOHNSON, of Foreston, in the county ofOgle and State 4of Illinois, have invented a new and Improved andbrusher, combined in one lnachine, and

having a fan-blower so contrived that each diii'erent part is subject toair-currents for taking Oft' the light impurities freed from the grainor exposed to the air in it.

Figure 1 is a sectional elevation of my im- Fig. 2 is a top view. Fig. 3is a plan ot' the bottom. Fig. 4 is a plan of the upper head of thescouring-drum, and Fig. 5 is partly a side elevation and partly asection.

Similar letters of reference indicate corresponding parts. v

A represents a screen on the topof' the ma chine into which the grain isfirst delivered, and from which it passes into the spout B forconducting it into the scourer. In the upper portion of spout B thegrain is subjected to an upward draft of aair, which passes throughOpenings O into vacuum chamber D, and thence through passage E to fan F,and takesy Oft the light matters exposed to it in the spout 1B. Thegrain passing over into the vacuuinchamber D falls therein, and passesOut through the valve G. H is a valve to regulate the admission of airto the vacuum-chamber, and thus determine the strength of the blast. Iis the `perforated stationary case of the scourer; J., upper head; K,lower head, and L-rozls, altogether forming the drum of the scourer,below which is a brushing contrivance, vconsisting Of van extension ofthe perforated case I and the revolving brushes M.

Both the scourer and the brush are tapered, asI shown. so thatthedescent of the grain will be obstructed more than it would it' byreason of a true cylindrical form its passage was vertical.

Outside of the perforated case I, and at suitable distance from it for adust-space, `is

l another unperforated case, N, in which space air-currentsareestablished by the fan F for carrying oft' the dust and other lightmatters set free by the scourer and brush, the air being admittedthrough passages O at the bottom with regulators P, and passing upthrough openings Q. The grain passes oft' through spout R intosuction-spout S, where it is again .subjected to a strong air-current totake out vthe heavier impurities. A valve, T, in this spout, regulatesthe action ofthe draft, and a vacuum-chamber, V, receives the graincarried .up in the spout.

The screen Ais operated by an eccentric, L', On the shaft, with whichthere is an adjustable yoke, m,'to regulate the action, and in practicethe eccentric will be made adjustable, to let it down on the shat'tfro'mtime to time as the latter is raised by the adjustable step-bearerZ for adjusting the brush as it wears away.

The upper head to th. scourer is made open, tolet grain fall into thedrum to be thrown out against and between the rods, but the lower headis close, to exclude the grain from the interior of the brush.

Having thus described my invention, I claim as new and desire to secureby LettersPatent-.-

1 The combination, with scourer A, spout B, fan F, and passage E, ofchamber D, intermediate between the spout and passage, and

provided with Openings O, as and for the 'purpose described. p

-2. lThe combination, with fan F, ot' perforated case I, im perforatecase N ,'open upper head J, closed lower head K, and rods L, allarranged as and for the purpose set forth.

3. The combination of a regulating-valve, T, with spout S, provided withsettling-chamber V and fan F, as and for the purpose specitied.

EDWIN WHELER JOHNSON.

